Frequently Asked Questions
Find quick answers to common questions about UUID Studio Pro
No! The app works completely offline once loaded. Only the initial page load needs internet.
In your browser's local storage on your computer. It never leaves your device.
Yes, but data doesn't sync between devices. Export from one device and import to another.
No, but the web app works great on mobile browsers with responsive design.
Limited by browser storage (usually 5-10MB). Approximately 10,000-50,000 UUIDs.
Yes! UUID v4 has a collision probability of ~1 in 5.3 trillion.
They're the same thing. GUID is Microsoft's term for UUID. GUID is usually uppercase.
UUID v4 for most cases. UUID v7 for database primary keys. See "Choosing the Right UUID Type" in the help documentation.
Yes! UUIDs are a standard format. No licensing or restrictions.
Yes, they use cryptographically secure random number generation.
ULID is like UUID but more readable and sortable. Use for user-facing IDs or API keys.
Browser data might have been cleared, or you're in a different browser/profile. Always export backups!
Enable auto-cleanup, set a history limit, or export old data and clear history. Charts are optimized to only re-render when data changes.
Yes, if you haven't closed the tab - use Undo (Ctrl+Z). Otherwise, no - they're permanently deleted.
Check that your JSON is properly formatted. The app validates JSON structure and field types. Use a JSON validator online if needed.
Refresh the page. If problem persists, check browser console for errors.